4297720249 has 3 divisors (see below), whose sum is σ = 4297785807. Its totient is φ = 4297654692.

The previous prime is 4297720171. The next prime is 4297720253. The reversal of 4297720249 is 9420277924.

The square root of 4297720249 is 65557.

It is a perfect power (a square), and thus also a powerful number.

4297720249 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 3077475625 + 1220244624 = 55475^2 + 34932^2 .

It is not a de Polignac number, because 4297720249 - 2²⁵ = 4264165817 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 4297720199 and 4297720208.

It is not an unprimeable number, because it can be changed into a prime (4297720849) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 32779 + ... + 98335.

It is an arithmetic number, because the mean of its divisors is an integer number (1432595269).

Almost surely, 2^4297720249 is an apocalyptic number.

4297720249 is the 65557-th square number.

4297720249 is the 32779-th centered octagonal number.

It is an amenable number.

4297720249 is a deficient number, since it is larger than the sum of its proper divisors (65558).

4297720249 is an frugal number, since it uses more digits than its factorization.

4297720249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131114 (or 65557 counting only the distinct ones).

The product of its (nonzero) digits is 508032, while the sum is 46.

The cubic root of 4297720249 is about 1625.8459026534.

The spelling of 4297720249 in words is "four billion, two hundred ninety-seven million, seven hundred twenty thousand, two hundred forty-nine".